Kerzoncuf M, Viton JM, Pellas F, et al. - Researchers conducted this multicenter randomized double-blind trial to evaluate the impacts of injecting botulinum toxin into the lower limb muscles of people with hemiparesis poststroke in terms of their sway areas. Participants in the study were 40 people with hemiparesis with chronic poststroke lower limb spasticity. For this investigation, 40 people poststroke were registered and randomized into two groups, one of which was treated with botulinum toxin (n = 19) and the other with placebo (n = 21). Treating spasticity by injecting botulinum toxin into the poststroke lower limb muscles of individuals tends to improve their postural sway. For this reason, the dual-task used here to assess sway seems to be a useful, sensitive test.